<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>访问丢失了哦</title>
</head>
<body>
<div style="width: 100%;height: 300px;background-color: skyblue;opacity: 0.6;border: 1px solid silver">
    <div style="margin: 150px 45%;color: black;">
        <h2>页面丢失了哦</h2>
    </div>
</div>
</body>
</html>